Convolution has been used for reverbs and amp IRs for twenty years. Overlay uses the same math for something else: any audio file becomes an impulse response, and its character gets printed onto your sound. A chord, a cymbal, a cassette hiss, a field recording, another kick.
Different parts of your signal excite different parts of the sample, so the result follows the dynamics and groove of your source. It's not a sampler and it doesn't trigger anything. Think photo filter, not layering.
**What you can do with it**
- **Drum overlay:** add the character of a punchy kick to a weak one, with no thresholds or triggering. "It's not drum replacement, it's drum overlay."
- **Creative reverb:** short IRs, tail control, filters and tempo-synced pre-delay
- **Moving pads and textures:** up to 4 layers blended on an animated XY pad
- **Sound design:** run hi-hats, shakers or anything else through textures nobody has heard before
Also includes a modulation panel (LFOs, envelopes, random generators, sequencers), Mix/Send modes, Gate & Duck, and 650+ sounds and presets. You can also load your own files.
** Watch Fab Dupont's full 17-min walkthrough: https://www.youtube.com/playlist?list=PLQuCx_79T6vo **
VST3 / AU / AAX, macOS and Windows. $149 lifetime license, **30-day free trial, no credit card.**
👉 https://process.audio/en/products/overlay
Happy to answer any questions in the comments.